fix(i18n): quote raw <name> in the auto-sync profiles description

[pacocartones]

Summary

• featureFlags.definitions.OMNIROUTE_AUTO_SYNC_CLAUDE_PROFILES.description (src/i18n/messages/en.json:12971 and the same key in the other 41 locales) carries the literal path ~/.claude/profiles/<name>/settings.json. next-intl parses <name> as a rich-text tag; FeatureFlagsGrid.tsx:426-428 renders the description through plain t() and never passes a tag element, so the message fails to compile with INVALID_MESSAGE: UNCLOSED_TAG and the Settings → Feature Flags card shows the raw key instead of the description, in every language.
• The placeholder is now wrapped in ICU single quotes ('<name>') in all 42 locale files and in the TypeScript default (src/shared/constants/featureFlagDefinitions.ts:613), the same form as fix(i18n): wrap ccOnboardingKeyPlaceholder in ICU single quotes across all 43 locales #12369 for ccOnboardingKeyPlaceholder. One substring changed per file, nothing else touched. Reproduced and verified against use-intl's development build (the one Turbopack dev mode loads): raw <name> → UNCLOSED_TAG + key fallback; '<name>' → the literal path renders; <name> → the entities are returned verbatim by t() and would be displayed as text, so the entity form used by earlier fixes is not suitable for a real file path the user is meant to copy. The production build of use-intl tolerates the raw tag on the plain t() path, which is why the symptom is context-dependent, as the report says.
• Deliberately out of scope: the reporter's second follow-up (a CI gate that parses every en.json value with the ICU parser). tests/unit/i18n-vi-completeness.test.ts already skips any key whose English source does not parse, so that gate is a separate change with its own allowlist; it will be proposed as an issue first. This PR fixes one message and adds one focused guard.

Related Issues

• Closes fix: escape raw <name> tag in OMNIROUTE_AUTO_SYNC_CLAUDE_PROFILES description across 43 locales #12505
• Related to fix(claude): ccOnboardingKeyPlaceholder has invalid ICU tag in all 43 locales — INVALID_TAG crashes the Claude Code onboarding block #12302 / fix(i18n): wrap ccOnboardingKeyPlaceholder in ICU single quotes across all 43 locales #12369 (same class, ccOnboardingKeyPlaceholder, same ICU-quote form)

Validation

• Change type: i18n
• Focused tests and category gates from the golden path: new test 5/5; tests/unit/i18n-vi-completeness.test.ts, i18n-cc-alias-unclosed-tags, i18n-deno-relay-unclosed-tag, i18n-placeholder-parity, i18n-ui-value-drift, i18n-translation-ratio-gate, settings-i18n-keys, i18n-config 43/43; npm run i18n:sync-ui:dry, npm run i18n:check-ui-coverage, npm run i18n:check-value-drift, npm run i18n:check-glossary all PASS; npm run check:changelog-integrity OK; node scripts/check/check-complexity-ratchets.mjs --base-ref origin/release/v3.8.51 OK; vi.json carries no __MISSING__ marker for this key
• npm run lint — eslint and prettier run on the two touched source/test files only (exit 0); the repository-wide run was not executed for a one-substring locale change
• Reconciled with the current active release base release/v3.8.51; focused checks rerun afterward
• Production-code changes include a new or updated automated test in this PR
• SonarQube is temporarily opt-in while the private project has no quota; it is not a PR gate.

Mutation: with the locale/TS change reverted the new test fails 3 of 5 cases (ICU parse, quoted form, TS default); green 5/5 with the change.

Tests Added Or Updated

• tests/unit/i18n-feature-flag-auto-sync-profiles-tag-12505.test.ts (new, 5 cases): the key exists in all 42 locales (count from config/i18n.json, no BOM); every locale value parses with @formatjs/icu-messageformat-parser; every locale uses profiles/'<name>'/ and neither the raw nor the entity form; createTranslator renders ~/.claude/profiles/<name>/settings.json literally in every locale with no INVALID_MESSAGE; the TypeScript default parses and uses the same quoting.

Coverage Notes

• src/shared/constants/featureFlagDefinitions.ts: one string literal changed; the new test imports the module and asserts the OMNIROUTE_AUTO_SYNC_CLAUDE_PROFILES description. No logic changed, no coverage moved.
• src/i18n/messages/*.json are data files, covered by the new test and by the existing i18n-vi-completeness ICU-regression case, which now actively checks this key because the English source parses.

Reviewer Notes

• The diff is 42 locale lines plus one TS line, each replacing profiles/<name>/ with profiles/'<name>'/; a git diff --word-diff review confirms nothing else moved (no reordering, no BOM, same trailing newline).
• The open PRs that touch the locale files (feat(dashboard): adaptive context-budget dial on compression panel #12488, feat(settings): persist headroomUrl for the Headroom proxy #12487, feat(runtime): add reasoning replay feature flag #12486, fix(i18n): wrap ccOnboardingKeyPlaceholder in ICU single quotes across all 43 locales #12369, feat(ui): add TTFT column alongside TPS in RequestLoggerV2 with backend telemetry #12148 and others) edit different keys; none touches OMNIROUTE_AUTO_SYNC_CLAUDE_PROFILES, so a rebase is textual-only. feat(runtime): add reasoning replay feature flag #12486 edits featureFlagDefinitions.ts around lines 298-323, away from line 613.
• Translators: the two apostrophes are ICU syntax, not copy; a future translation pass must keep '<name>' intact or the card breaks again (the new test catches it).